[PATCH] mx6sabresd: Make checkboard respect CONFIG_NXP_BOARD_REVISION

[sbabic at denx.de]

> The default implementation of checkboard() calls the
> nxp_board_rev_string() function
> to retrieve a character representing the revision number of the board.
> However, this
> attempt to retrieve the revision number may fail in certain situations or be
> otherwise undesirable.
> There is already a configuration option to avoid retrieving the
> revision number of
> the board: CONFIG_NXP_BOARD_REVISION. In fact, if this option is enabled, the
> nxp_board_rev_string() function's definition will be omitted entirely,
> meaning that the previous implementation of checkboard() would result
> in a linker error.
> This changeset makes the default implementation of checkboard() respect the
> CONFIG_NXP_BOARD_REVISION configuration option, only attempting to retrieve
> the board revision number if that option is defined.
> Signed-off-by: Cody Gray <cody at codygray.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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